package net.floodlightcontroller.util;

import java.util.ArrayList;

import net.floodlightcontroller.core.INetMapTopologyObjects.IFlowEntry;
import net.floodlightcontroller.core.INetMapTopologyObjects.IFlowPath;
import net.floodlightcontroller.util.CallerId;
import net.floodlightcontroller.util.DataPath;
import net.floodlightcontroller.util.FlowId;

import org.codehaus.jackson.annotate.JsonProperty;

/**
 * The class representing the Flow Path.
 */
public class FlowPath implements Comparable<FlowPath> {
    private FlowId flowId;		// The Flow ID
    private CallerId installerId;	// The Caller ID of the path installer
    private DataPath dataPath;		// The data path

    /**
     * Default constructor.
     */
    public FlowPath() {
	dataPath = new DataPath();
    }
    
    /**
     * Constructor to instantiate from object in Network Map
     */
    public FlowPath(IFlowPath flowObj) {
    	dataPath = new DataPath();
    	this.setFlowId(new FlowId(flowObj.getFlowId()));
    	this.setInstallerId(new CallerId(flowObj.getInstallerId()));
    	this.dataPath().srcPort().setDpid(new Dpid(flowObj.getSrcSwitch()));
    	this.dataPath().srcPort().setPort(new Port(flowObj.getSrcPort()));
    	this.dataPath().dstPort().setDpid(new Dpid(flowObj.getDstSwitch()));
    	this.dataPath().dstPort().setPort(new Port(flowObj.getDstPort()));

    	//
    	// Extract all Flow Entries
    	//
    	Iterable<IFlowEntry> flowEntries = flowObj.getFlowEntries();
    	for (IFlowEntry flowEntryObj : flowEntries) {
    	    FlowEntry flowEntry = new FlowEntry();
    	    flowEntry.setFlowEntryId(new FlowEntryId(flowEntryObj.getFlowEntryId()));
    	    flowEntry.setDpid(new Dpid(flowEntryObj.getSwitchDpid()));

    	    //
    	    // Extract the match conditions
    	    //
    	    FlowEntryMatch match = new FlowEntryMatch();
    	    Short matchInPort = flowEntryObj.getMatchInPort();
    	    if (matchInPort != null)
    		match.enableInPort(new Port(matchInPort));
    	    Short matchEthernetFrameType = flowEntryObj.getMatchEthernetFrameType();
    	    if (matchEthernetFrameType != null)
    		match.enableEthernetFrameType(matchEthernetFrameType);
    	    String matchSrcIPv4Net = flowEntryObj.getMatchSrcIPv4Net();
    	    if (matchSrcIPv4Net != null)
    		match.enableSrcIPv4Net(new IPv4Net(matchSrcIPv4Net));
    	    String matchDstIPv4Net = flowEntryObj.getMatchDstIPv4Net();
    	    if (matchDstIPv4Net != null)
    		match.enableDstIPv4Net(new IPv4Net(matchDstIPv4Net));
    	    String matchSrcMac = flowEntryObj.getMatchSrcMac();
    	    if (matchSrcMac != null)
    		match.enableSrcMac(MACAddress.valueOf(matchSrcMac));
    	    String matchDstMac = flowEntryObj.getMatchDstMac();
    	    if (matchDstMac != null)
    		match.enableDstMac(MACAddress.valueOf(matchDstMac));
    	    flowEntry.setFlowEntryMatch(match);

    	    //
    	    // Extract the actions
    	    //
    	    ArrayList<FlowEntryAction> actions = new ArrayList<FlowEntryAction>();
    	    Short actionOutputPort = flowEntryObj.getActionOutput();
    	    if (actionOutputPort != null) {
    		FlowEntryAction action = new FlowEntryAction();
    		action.setActionOutput(new Port(actionOutputPort));
    		actions.add(action);
    	    }
    	    flowEntry.setFlowEntryActions(actions);

    	    String userState = flowEntryObj.getUserState();
    	    flowEntry.setFlowEntryUserState(FlowEntryUserState.valueOf(userState));
    	    String switchState = flowEntryObj.getSwitchState();
    	    flowEntry.setFlowEntrySwitchState(FlowEntrySwitchState.valueOf(switchState));
    	    //
    	    // TODO: Take care of the FlowEntryMatch, FlowEntryAction set,
    	    // and FlowEntryErrorState.
    	    //
    	    this.dataPath().flowEntries().add(flowEntry);
    	}
    }

    /**
     * Get the flow path Flow ID.
     *
     * @return the flow path Flow ID.
     */
    @JsonProperty("flowId")
    public FlowId flowId() { return flowId; }

    /**
     * Set the flow path Flow ID.
     *
     * @param flowId the flow path Flow ID to set.
     */
    @JsonProperty("flowId")
    public void setFlowId(FlowId flowId) {
	this.flowId = flowId;
    }

    /**
     * Get the Caller ID of the flow path installer.
     *
     * @return the Caller ID of the flow path installer.
     */
    @JsonProperty("installerId")
    public CallerId installerId() { return installerId; }

    /**
     * Set the Caller ID of the flow path installer.
     *
     * @param installerId the Caller ID of the flow path installer.
     */
    @JsonProperty("installerId")
    public void setInstallerId(CallerId installerId) {
	this.installerId = installerId;
    }

    /**
     * Get the flow path's data path.
     *
     * @return the flow path's data path.
     */
    @JsonProperty("dataPath")
    public DataPath dataPath() { return dataPath; }

    /**
     * Set the flow path's data path.
     *
     * @param dataPath the flow path's data path to set.
     */
    @JsonProperty("dataPath")
    public void setDataPath(DataPath dataPath) {
	this.dataPath = dataPath;
    }

    /**
     * Convert the flow path to a string.
     *
     * The string has the following form:
     *  [flowId=XXX installerId=XXX dataPath=XXX]
     *
     * @return the flow path as a string.
     */
    @Override
    public String toString() {
	String ret = "[flowId=" + this.flowId.toString();
	ret += " installerId=" + this.installerId.toString();
	ret += " dataPath=" + this.dataPath.toString();
	ret += "]";
	return ret;
    }
    
    /**
     * CompareTo method to order flowPath by Id
     */
    @Override
    public int compareTo(FlowPath f) {
    	return (int) (this.flowId.value() - f.flowId.value());
    }

}